How to Submit Crash Report?

I am experiencing Vivaldi crashing a lot on Kubuntu 16.04 and would love to submit a crash report to the dev team to look at and try to resolve. Unfortunately, I'm not sure where the log files are located or what would be needed to submit a crash report? Are there special crash files? Any assistance would be greatly appreciated.

Thank you. The only thing that I could find is the ~/.config/vivaldi/Crash Reports directory. Unfortunately, there are no files in this directory. I did a search for crashpad and nothing was returned.

Vivaldi will frequently stop responding, close and restart itself (sometimes repeating those three steps several times back to back to back) which I would think should classify as a crash therefore I'm a bit perplexed why there is no crash log.

Am I looking at the right location? Are there any other log files that I could submit?